Lake Graham: 66.8% full as of 2026-09-11

Historical Data

Date Percent Full Mean Water Level
(ft) 		Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft) 		Surface Area
(acres)
Today 2026-09-11 66.8 1,068.23 30,252 30,238 45,288 1,942
Yesterday 2026-09-10 66.8 1,068.23 30,252 30,238 45,288 1,942
2 days ago 2026-09-09 66.9 1,068.25 30,291 30,277 45,288 1,943
1 week ago 2026-09-04 67.5 1,068.41 30,603 30,589 45,288 1,956
1 month ago 2026-08-11 71.5 1,069.30 32,375 32,361 45,288 2,028
3 months ago 2026-06-11 76.4 1,070.37 34,596 34,582 45,288 2,125
6 months ago 2026-03-11 76.9 1,070.49 34,851 34,837 45,288 2,134
1 year ago 2025-09-11 88.4 1,072.81 40,047 40,033 45,288 2,294
*

Percent Full is based on Conservation Storage and Conservation Capacity and doesn't account for storage in flood pool.

**

   Values above, including today's are averaged conditions. For near real-time instantaneous water level, see table below or the interactive map viewer.

Most Recent Instantaneous Water Level

Date/time Water Level
(ft) 		Conservation Pool Elevation
(ft) 		Height Above Conservation Pool
(ft)
Most recent 2026-09-11 09:00 1,068.23 1,075.00 -6.77
1 hour prior 2026-09-11 08:00 1,068.23 1,075.00 -6.77
2 hours prior 2026-09-11 07:00 1,068.23 1,075.00 -6.77
6 hours prior 2026-09-11 03:00 1,068.23 1,075.00 -6.77
12 hours prior 2026-09-10 21:00 1,068.23 1,075.00 -6.77
24 hours prior 2026-09-10 09:00 1,068.23 1,075.00 -6.77
48 hours prior 2026-09-09 09:00 1,068.25 1,075.00 -6.75
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1958-01-01
Vertical datum NGVD29 +1.3
Dead pool elevation 1,030.00 ft above NGVD29 +1.3
Service spillway crest elevation 1,076.30 ft above NGVD29
Top of dam elevation 1,093.30 ft above NGVD29
Conservation pool elevation 1,075.00 ft above NGVD29 +1.3
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1958-01-01 (source: USGS)
1998-04-01 (source: TWDB) : GIS Data
Data Source USGS:08088400
USGS Monitoring Location USGS:08088400

Lake Location